/u/privatly's posts
I had my teeth cleaned and had fluoride put on them three or four hours ago. Can I still brush my teeth before I go to bed in four or five hours?
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I had my teeth cleaned and had fluoride put on them this afternoon. Can I still brush my teeth before I go to bed tonight?
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I had my teeth cleaned and had fluoride put on them this afternoon. Can I still brush my teeth before I go to bed tonight?
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How can people still live in Hiroshima and Nagasaki, or even visit Ground Zero at the Trinity Test Site? Do certain types of radiation disappear quickly?
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On an episode of Superman, from the 1950s TV series, they said the Earth was hollow. What would that be like?
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What would it mean if the universe is infinite in size? Do a lot of scientists believe it is infinite in size?
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